Can you think of any three-dimensional shape that comprises of exactly two surfaces?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

Spot what is wrong here in below Picture?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

What do you call a fish without an eye?

Can you start the fire using two pieces of wood?

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

A man walked into a pub and went straight towards the Barman. He asked for a dirty martini from the Barman. The Barman thought something and then pulled out a pistol from his drawer and aimed it directly at the man. Why did he do that?

What is the next number in this matchsticks series riddle?